Swift Streams Research Articles

Telebasis Flammeola, T. Carota and T. Livida, New Dragonflies from Ecuador (Odonata: Coenagrionidae)

The following descriptions are of material collected by William Clarke-MacIntyre on the head-waters of Tributaries to the Amazon in the Province of Oriente, Ecuador. They are from the edge of the Amazonian jungle on the lower eastern slope of the Andes Mountains, a tropical region of swift streams lying 400-8OO meters above sea-level. The types are in the author's collection.

Metabolic Rates of Trout Fry from Swift and Slow-Running Waters

ABSTRACT Recent studies on the respiration of fresh-water animals have shown that certain species of ephemerid nymphs and trichopterid larvae inhabiting swift streams have a higher oxygen consumption than other species, comparable in size, which live in still waters, the measurements being made under identical conditions (Fox, Simmonds and Washbourn, 1935). Moreover, within one species of crustacean, Asellus aquaticus, individuals from rapid water have a higher metabolic rate than those from slow water (Fox and Simmonds, 1933). The investigation reported below was undertaken to find out whether trout would show a similar phenomenon.

Metabolic Rates of Ephemerid Nymphs From Swiftly Flowing and From Still Waters

ABSTRACT The oxygen consumptions of the small ephemerid nymphs Ephemerella ignita and Coenis sp. are (anaesthetised at 10° C.) 950 and 290 c.mm./gm./hour. Their habitats are respectively a stream and a pond. The oxygen consumptions of the large ephemerid nymphs Ecdyonurus venosus, Ephemera danica and E. vulgata are (anaesthetised at io° C.) 604, 370 and 278 c.mm./gm./hour. They live, respectively, under stones in a swift stream, burrowing in sand in a stream, and burrowing in mud in a pond. Ecdyonurus venosus is less resistant to oxygen deficiency than Ephemera danica and E. vulgate; and Baetis rhodani (swift stream) is less resistant than Chloeon dipterum (pond).

The Vapour Pressures of the Blood of Arthropods from Swift and Still Fresh Waters

ABSTRACT It has been shown that the oxygen consumption of caddis larvae and mayfly nymphs from swift streams is considerably greater than that of comparable species from still waters, and that within one species of isopod Crustacea, Asellus aquaticus, individuals from swift water consume more oxygen than those from slow water (Fox and Simmonds, 1933; Fox, Simmonds and Washbourn, 1935). It has also been shown that the oxygen consumption of fresh-water Crustacea is greater than that of their marine relatives (Fox and Simmonds, 1933). Now, in marine invertebrates, the osmotic pressure of the blood is close to that of sea water, whereas in fresh-water invertebrates the difference between the osmotic pressures of blood and water is great. In fresh water compared with marine Crustacea, then, a higher oxygen consumption goes together with a considerable inequality between internal and external osmotic pressures.

Sedimentation of the Pico Formation in the Ventura Quadrangle, California

The rocks of the Ventura quadrangle are sedimentary strata ranging from Cretaceous to Recent. The pre-Pliocene beds reach a thickness of 22,000 feet, and crop out in parallel, east-west belts. They consist of conglomerates, sandstones, and shales, with minor proportions of dolomite and limestone. The Pliocene beds comprise the Pico and Saugus formations, which crop out south of the older formations. The Pico formation is divided for convenience of discussion into a lower member 9,300 feet thick and an upper member 3,000 feet thick. The lower Pico consists of heavy conglomerates, sandstones, and clays containing many cross-laminated beds, ripple-marks, and cut-and-fill structures; while the upper Pico consists of monotonously even-bedded, homogeneous, silty clay. A comparison of the petrology of the older formations and of the Pico indicates that the Pico sediments were derived from these older rocks. During lower Pico time short, swift streams carried detritus from a youthful land-mass located just north of the present outcrop of the formation, to a marine basin. Deposition took place rapidly, and the bottom was recurrently depressed while the adjacent land-mass was recurrently uplifted. By upper Pico time the land-mass had been reduced to maturity or old age, and only the finer debris was carried to the basin.

Ecological Studies on Aquatic Insects. III. Adaptations of Caddisfly Larvae to Swift Streams

EcologyVolume 6, Issue 2 p. 123-137 Article Ecological Studies on Aquatic Insects. III. Adaptations of Caddisfly Larvae to Swift Streams G. S. Dodds, G. S. DoddsSearch for more papers by this authorFrederick L. Hisaw, Frederick L. HisawSearch for more papers by this author G. S. Dodds, G. S. DoddsSearch for more papers by this authorFrederick L. Hisaw, Frederick L. HisawSearch for more papers by this author First published: 01 April 1925 https://doi.org/10.2307/1929367Citations: 27AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Citing Literature Volume6, Issue2April 1925Pages 123-137 RelatedInformation

Ecological Studies of Aquatic Insects: Adaptations of Mayfly Nymphs to Swift Streams

Ecological Studies of Aquatic Insects: Adaptations of Mayfly Nymphs to Swift Streams

Ecological Studies of Aquatic Insects: Size of Respiratory Organs in Relation to Environmental Conditions

While making a study of the insect larvae, mayflies, stoneflies and caddisflies of mountain lakes and streams in the Front Range of the Rockies near Tolland, Colorado,2 it was observed that, with very few exceptions, the species living in the lakes and quieter parts of the streams had the respiratory organs larger in proportion to the size of their bodies than the larvae living in the swift streams. It was also noted that there was a tendency for the species living tinder stones in the stream and on pond bottoms with much decaying plant material to have large respiratory organs. These facts seem to be correlated with two things, (i) the oxygen content of the water and (2) the swiftness of the current. With these observations in mind, sudies were made to determine the relationship between the area of the respiratory surface and the body weight for the representative species of the different habitats. I. MAYFLY NYMPHS

Ecological Studies of Aquatic Insects: Adaptations of Mayfly Nymphs to Swift Streams

EcologyVolume 5, Issue 2 p. 137-148 Article Ecological Studies of Aquatic Insects: Adaptations of Mayfly Nymphs to Swift Streams G. S. Dodds, G. S. DoddsSearch for more papers by this authorFrederick L. Hisaw, Frederick L. HisawSearch for more papers by this author G. S. Dodds, G. S. DoddsSearch for more papers by this authorFrederick L. Hisaw, Frederick L. HisawSearch for more papers by this author First published: 01 April 1924 https://doi.org/10.2307/1929011Citations: 31AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat Citing Literature Volume5, Issue2April 1924Pages 137-148 RelatedInformation

Bull Lake Creek rock slide in the Wind River Mountains of Wyoming

Research Article| January 01, 1917 Bull Lake Creek rock slide in the Wind River Mountains of Wyoming E. B. BRANSON E. B. BRANSON Search for other works by this author on: GSW Google Scholar GSA Bulletin (1917) 28 (1): 347–350. https://doi.org/10.1130/GSAB-28-347 Article history received: 12 Feb 1917 first online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation E. B. BRANSON; Bull Lake Creek rock slide in the Wind River Mountains of Wyoming. GSA Bulletin 1917;; 28 (1): 347–350. doi: https://doi.org/10.1130/GSAB-28-347 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu nav search search input Search input auto suggest search filter All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract Regional RelationsBull Lake Creek is a swift stream tributary to Bull Lake, in Fremont County, Wyoming. For a stretch of from 7 to 12 miles west of the lake it occupies a canyon 2,000 to 4,000 feet deep with walls developed at two levels. The inner canyon is cut in granite to a depth of 2,000 feet. The walls of the outer canyon, separated from the rim of the granite gorge by a steeply sloping terrace 1 to 2 miles wide, rise to heights of 800 to 1,000 feet (plate 21, figure 1). The total width of the outer canyon is 3 to 4 miles at its western end, but decreases to about 1½ miles at a point 7 miles farther east. The walls of the outer canyon are composed of sedimentary rocks, which range from Cambrian to Pennsylvanian in age. At its west end the Bull Lake2 Creek (Cambrian), Shoshoni . . . This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.